地下核爆炸地震波二次源特征  

The characteristic of the waveform from the second source induced by underground explosion

作　　者：何永锋[1] 赵克常[2] 张献兵[2] 马裕然[1] 王洋[1] 

机构地区：[1]装甲兵工程学院基础部,北京100072 [2]北京大学地球与空间科学学院,北京100871

出　　处：《地球物理学报》2012年第5期1742-1748,共7页Chinese Journal of Geophysics

基　　金：国家自然科学基金项目(40874023)资助

摘　　要：层裂是地下核爆炸震源物理过程中最重要的非球对称源过程.对其机制的研究,多基于面波资料,本文基于远场体波资料,利用经验格林函数方法,消除路径及接收场地效应,利用地下核爆炸远场地震波P波数据对震源时间函数进行了反演,结果显示明显的双脉冲特征,该二次源特征不随方位角及震中距变化,说明它源自震源本身,其双脉冲特征与层裂机制相符.It was widely accepted that the spall slapdown is the primary contributor to the non spherical source of underground explosions based on the study of surface waves. In this article, body waves are analyzed to search the mechanism of the non-spherical process of the underground nuclear explosion. The second arrival after the P arrival is obvious and pulses is remarkably consistent in a wide azimuthal range. This indicates th not due to any structural features but is part of the source itself, and can be process. the shape of the two at the second arrival is explained by the spall

关 键 词：地下核爆炸 层裂 经验格林函数 

分 类 号：P315[天文地球—地震学]